What can I do if keypad tones (DTMF) are not transmitted?

Fix DTMF problems in sipgate: here’s how to configure keypad tone transmission on SNOM, Yealink, and other VoIP devices.

Dual Tone Multifrequency (DTMF) refers to the transmission of key tones over the telephone network to the receiving party.

Default setting for all devices

Open the configuration menu of your phone/VoIP adapter/VoIP app and select in the section DTMF and via RTP (RFC2833)

SNOM device

In the web configuration menu, set Identity 1 (sipgate) and SIP as well as the option DTMF via SIP INFO on and.

sipgate help center-dmft3.png

Additionally, in the tab RTP the option RTP encryption on and and the Long SDP response on on set.

sipgate help center-dmft2.png

Siemens/Gigaset

Asterisk

Draytec Vigor

GS Wave